The engine immobiliser system is designed to prevent the vehicle from being stolen. This system uses a transponder key ecu that stores the key codes of authorized ignition keys. If an attempt is made to start the engine using an unauthorized key, the ecu sends a signal to the ecm to prohibit fuel delivery and ignition, effectively disabling the engine.

The transponder key coil receives this signal, the transponder key amplifier amplifies it, and then the signal is transmitted to the ecu. The ecu matches the key's id code with the vehicle's id code, which was previously registered in the ecu and then communicates the results to the ecm using sfi communication.
Engine immobiliser system
How to proceed with troubleshootingComponents
Fuse boxes
Engine oil filler cap
Engine oil level dipstick
Battery
Brake fluid reservoir
Radiator
Electric cooling fan
Condenser
Washer fluid tank
Engine coolant reservoir
Checking the engine oil
With the engine at operating
temperature and turned off,
check the oil level on the di ...
Precaution
Tire pressure warning system precaution
When the tire pressure warning light turns on,
immediately check the tire pressure of the tire and
adjust it to the specified value. (When the tire
pressure warning light circuit is open, the tire
pressure warning light flashes for 1 minut ...
Installation (2005/11-2006/01)
Install front drive shaft assembly lh
Coat the spline of the inboard joint shaft with gear
oil.
Using a brass bar and hammer, align the shaft
splines in the drive shaft.
Notice:
Set the snap ring with the opening side facing
downwards.
Be careful not to damage the oil s ...